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  • Modeling shallow-water hydrodynamics : rotations, rips, and rivers

    Creator:
    Long, Joseph W.
    Abstract:
    Hydrodynamic models are used as a diagnostic tool to understand the temporal variability of shallow-water processes that are difficult to completely resolve with traditional field measurements. For all simulations, modeled quantities are qualitatively or quantitatively compared with available measurements to gain confidence in conclusions derived from the modeled results. In...
    Resource Type:
    Dissertation
    Full Text:
    . The model and data are in good agreement for all wave conditions during the month and estimated model

  • Parameters affecting mechanical collisions

    Creator:
    Aum, Ho Sung
    Abstract:
    Even though the elastic deformations that occur during the impact of colliding bodies may be small in comparison to their actual dimensions, they play an important role in mechanical collisions. During the time the bodies are in contact, elastic, friction, and inertia properties combine to produce a complex variation of...
    Resource Type:
    Dissertation
    Full Text:
    impulse and velocity changes that occur during contact. However, a considerably-simplified model captures

  • A nonlinear numerical model of the Lake Michigan Lobe, Laurentide Ice Sheet

    Creator:
    Jenson, John W.
    Resource Type:
    Dissertation
    Full Text:
    , Laurentide Ice Sheet Abstract approved Peter U. Clark A finite difference flowband model of the Late

  • Rebound predictions of mechanical collisions

    Creator:
    Lai, Liang-Ju
    Abstract:
    Predictions of mechanical collisions between two bodies frequently cannot be completed by the impulse-momentum equation together with a complete description of the motion of the system at the initial contact. Additional account must be taken of the deformations and frictional interaction induced by the impulsive reaction force, where the bodies...
    Resource Type:
    Dissertation
    Full Text:
    , a considerably simplified, coupled, conservative model, which captures the essential

  • Physical processes that control droplet transport in rock fracture systems

    Creator:
    Hay, Katrina M.
    Abstract:
    Aquifer recharge is generally driven by fluids that move from the Earth’s surface to groundwater through the unsaturated zone, also known as the vadose zone. When the vadose zone is fractured, fluids, which may include contaminants, can move through the fracture network as well as the porous matrix. Such a...
    Resource Type:
    Dissertation
    Full Text:
    empirical coefficient of proportionality, β, in Bico et al.’s diffusion model. The goal of the mathematical

  • Rebound predictions for elastic collisions

    Creator:
    Liu, Pao-pao
    Abstract:
    In this paper, a numerical method is used to predict the response of an elastic body during a collision in which both normal and tangential impulses are important. Results are compared with those from simplified prediction procedures, which stem from the assumptions that the energy-returning capacity of the normal deformation...
    Resource Type:
    Dissertation
    Full Text:
    TRANSIENT DYNAMIC ANALYSIS IN THE ANSYS PROGRAM 37 4.1 Selection of time step size 37 4.2 Model description

  • Modelling root reinforcement in shallow forest soils

    Creator:
    Skaugset, Arne E.
    Abstract:
    A hypothesis used to explain the relationship between timber harvesting and landslides is that tree roots add mechanical support to soil, thus increasing soil strength. Upon harvest, the tree roots decay which reduces soil strength and increases the risk of management -induced landslides. The technical literature does not adequately support...
    Resource Type:
    Dissertation

  • Geohydrologic conditions on a steep forested slope : modeling transient piezometric response to precipitation

    Creator:
    Bransom, Mark
    Abstract:
    Two hilislope sites in the central Oregon Coast Range were instrumented and monitored for winter precipitation and saturated and unsaturated subsurface conditions. The study sites were near-ridge depressions typically known as headwalls. Based on results of the monitoring, two existing mathematical models were adapted to predict piezometric levels in headwalls...
    Resource Type:
    Dissertation

  • Modeling and dating glacier fluctuations and their relation to Pacific Ocean climate

    Creator:
    Anslow, Faron S.
    Abstract:
    This thesis presents the results of an investigation into the interactions between the present-day South Cascade Glacier and the former Mauna Kea ice cap at short (annual to centennial) and long (millennial and multimillennial) time scales. To quantify the response of South Cascade Glacier to atmospheric conditions, a surface energy...
    Resource Type:
    Dissertation
    Full Text:
    ............................................................................ 75 3.4.1 Model Versus Measured Mass Balance and Ice Volume

  • Multiscale analysis of saturated flow in a porous medium with an adjacent thin channel

    Creator:
    Morales, Fernando A.
    Abstract:
    This thesis contains three parts addressing the asymptotic analysis of fluid flow through fully saturated porous medium in the presence of an adjacent thin channel. In the first part the problem is modeled by Darcy's law in both the porous medium and in the channel. The permeability in the channel...
    Resource Type:
    Dissertation
    Full Text:
    - ciple. A fully-coupled model with a lower dimensional interface problem is obtained in the limit as an